According to the statement, an internal affairs probe determined that she "engaged in adverse conduct" for being arrested for manslaughter in the shooting death of neighbor Botham Shem Jean, 26.
The Dallas Police department tweeted confirmation of the termination late Monday morning. DPD tweeted a news release that said she was sacked after an internal investigation found she had engaged in "adverse conduct" when charged with manslaughter.
An arrest affidavit obtained by Fox News said Botham allegedly ignored Guyger's "verbal commands" before she opened fire. Her chief of staff, Thomas Taylor, said that an administrative investigation was on hold until a criminal investigation into Guyger was complete.
She called 911. When asked where she was, she returned to the front door to see she was in the wrong unit, according to the affidavit.
On Sept. 14, protesters rallied from the Dallas Police Department, near the apartments where Guyger shot Jean, to downtown.
Guyger has been with the department since 2013.
"Officer Guyger was terminated for her actions".
Officials said a grand jury will hear the case. Despite how implausible her excuse was, Guyger remained free for three days until she turned herself in to be arrested, booked for manslaughter charges and released on bond during a brief, three-hour process.
"My commitment is to make sure that there's going to always be equal justice in this county, and that's my commitment to this community", Johnson said.